Adjustable lock-stbike



J. A. PLANTE.

ADJUSTABLE LOCK STRIKE.

APPLICATION FILED OCT- 8,1917.

1 ,3 1 7,21 8. Patented Sept. 30,

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JOSEPH A. PLANTE, OF SAN FRANCISCO, CALIFORNIA.

ADJUSTABLE LOCK-STRIKE.

Specification of Letters Patent.

Application filed October 8, 1917. Serial No. 195,227.

hereby declare the following to be a full, I

clear, concise, and exact description of the same.

The strike plates for principal object invention relates particularly todoor locks and has for its adjacent door lock in its engagement with thestrike plate Other objects and advantages will appear as thisdescription progresses.

In this specification and the annexed drawings, the invention is formconsidered to be the best, but it is to be understood that the inventionis not limthe invention in whatever form it may be because it may beembodied in other forms, and it is also to be understood that in and bytheclaims following the description it is desired to cover ited to suchform,

embodied, p

In the accompanying one sheet of drawings;

Figure 1 is a front elevation of a lock strike constructed in accordancewith this invention, installed in a section of the door jamb showndiagrammatically,

Fig. 2 is a detail in perspective looking at the b ack of the lockstrike assembly.

Fig. 3 is an end view of the same looking toward the front edge. y

Fig, 4 is a similar view looking toward the rear edge.

The most common form of door fastening consists of a suitable lockhaving a latch and a bolt, mortised into the edge of the door flush withthe surface thereof, except for the spring latch protruding therefromand controlled by the door knob. This latch and bolt engage a plategained into, the door jamb 1 adjacent to the stop 2, whereby theabutment of the door against the stop 2 alines the latch and the boltwith the opening in the plate. mechanical skill upon the part of thecarpenter to aflix this plate so as to accurately engage the latch andbolt,

' the plate as the adjustability of the strike plate to meet the latchor bolt of the illustrated in the It requires considerable consumingmeasurements, good judgment and careful mechanical work. Even when sohung in the first instance, the usual settling of buildings, warping ofdoors, shrinkage and the like, are very apt to disaline the lock and theplate, requiring mutilation of the door jamb to readjust the plategained therein or the filing away of a portion of required to restorethe proper relation of the parts. Such filing away of the plate isobjectionable because the original disaline-ment may be caused byswelling of the door or the door frame followed by shrinkage, whichwould permit rattling of the door latch or bolt within the plate. Thedisadvantages above recited and others are eliminated by the use of anadjustable strike plate in accordance with this invention.

In detail the construction illustrated in the drawings includes the jambplate 3 having the angular rim flange 4 cut away to receive the strikeplate 5, the jamb plate is installed by being gained into the jamb theordinary lock strike. The cut away portion of the jamb plate extendsinto the flange 4 a depth equal to the thickness of the strike plate,whereby the exposed surface of the strike plate and the surface of the jamb plate 3 are flush at this point.

The cut away portion or core of the jamb plate is not severed on theline7 but is bent downward to form the flange 8 parallel with the flange 4and is notched at 9 and 10 and slotted at l1 to receive the longitudinalextensions 12, 13, and 14 extending therethrough to guide the strikeplate in its lateral adjustment. The angular lugs 15 and 16 are alsostuck down out of the body of the strike plate 5 (see Fig. 2) and havethreaded extensions 17 and 18 parallel with the notched flange 8.

The plate 4 is provided with holes to receive the screws 19 and 20swiveling therein and engaging the threads. inthe plates 17 and 18extending through holes provided in the flange 8 on the rear side ofwhich they Patented Sept. 30,1919.

requiring time are riveted over, which cooperating with the heads of thescrews prevents their longitudinal movement, while swiveling freely in 1the door look, not shown. The central divithe bolt respectively. It isobvious howsion 13 divides this opening into recesses 22 and 23 for thereception of the latch and ever that this division 13 could be omitted.

It would also be unnecessary in the form of strike plate for use inconnection with locks not having a positive key bolt, but in which thespring vlatch is locked from withdrawal by mechanism within the lock, inWlllCl'l case 7 but a single opening such as 22 only is required in thejamb;

It is manifest that merely reasonable care and fair skill are requiredto properly install such an adjustable strike plate as described, carebeingused that the j amb plate 1 8 be reasonably near the propervertical level to engage the latch and the bolt. The openings 22 and23-usually are longer than necessary to allow for sagging of the doorwithin the frame.

The lateral location of the edge 21 of the 1 strike plate is adjusted bymeans of the screws 19 and 20 for the proper engagement of the latch andthe bolt. This adjustment can be made at any time by any unskilledperson of suflicient mechanical ability to use a screw driver. f Theheads of the screws 19 and 20. being at all times exposed within theroom; a simple turn to .right o'rleft'will move the strike plate in orout for the proper engagement. of the latch. Two screws are preferred aspreserving better alinement of the parts; buta single screw or itsequivalent would serve.

Modifications within the purview of this invention are contemplated inthe production of lock strikes of cast, or heavier material than thatshown or in meeting special requirements.

. 00 m of this patent may be obtained for five cents each, by addressing1 Washington, D. 0.

What I claim and desire to secure by Letters Patentis:. I v, 7 1." Alook strike including a jamb plate having an external rim flange anda'notched internal flange thereon; a screw swiveled in one ofsaidflanges; a strike plate having extensions guided in the notches in saidnotched plate, and engaging said screws.

2. A lock strike including a jamb plate havingan external rim flange"and a'notched internal flangeintegrally formed thereon; screw meansswiveled on both of said flanges; a strike plate having extensionsengaging the notches insaid notched flange, and having. integralv lugsengaging said scre means.- H V r 8. A look strike including a jamb'plate having an external extension bent at a right angle thereto; a slotformed in said 'jamb plate having themetal flangertherefrom bentparallel! to said. first mentioned extension;

notches cut in the ends of said flange; screw means lswiveled throughthe extension and thereon engaging the notches in said notched flangeand having integral lugs'thereon engaging said screw means, between theex core therefrom bent at a ,rightangle thereto toform a flange; anexposed extension on flange; a strike. plate having extensions.

tion' of a stationary jambplate and an adsaid jalnb plate-parallelwith-the flange for limiting thelate'ral movement of said ja'mb plate;screws extending through said exposed extension and flange andswivelly'held therein and, lugs on' said strike plate, be-

tween the extension and flange of the jamb plate engaging said screwsfor adjusting the position of said strike plate -with'relation to theslot in the jam-b plate. V

In testimony whereof, I have hereunto set my hand at San Francisco,.California,this 29th day of September, 1917.- l j g V JOSEPH A.VPLANTE.

In presence of V BALDWIN VALE, A. J. HENRY.

the Commissioner of Patents,

